Power-drill



NI; R. WOOD'.

POWER nmLL.

4 APPL 5, 12H9. 1,329,689, Patented Feb. 3,1920.

` ATTORNEY. Y

I .UNITED .STATES dfia/minar onirica.

izrAnrrivfnfwoon, o'rnunrnveroiv, WEST vrneiiim.

y POWER-DRILL.

Application led August 15, 1919.

To all whom 'it may conce/2%:

Be it known that I, IWIARTIN R. W'ooD, a

citizen of the United States of America, and resident of Huntington, in the county of Cabell and State of West Virginia, have invented certain new and useful Improvements in Power-Drills, of which the following is a specification.

This invention relates to power drills and particularly to means for 'utilizing the eX- haust port of power hammers of the pneumatic type whereby the pressure of the air is delivered for displacing cuttings, and dust, and blowing same away from the work and from the operators face, thus making it unnecessary to stop the drilling operation for the purpose of sweeping away the dust and chips which develop from the cutting operation, and to prevent interference with Vision and respiration.

A further object'of this invention is to produce novel means which may be attached to any of the standard makes of air hammers employed for carving stone, granite, or marble, the said device being so constructed as to permit the hammer to be laid fiat without damage to the attachment, and the said device being so made as to operate without in any way interfering with the user.

A still further object of this device is to produce an attachment which can be readily applied to or removed from a hammer and so it will have yielding action with respect to the hammer 'body to avoid any damage to the tubing while the hammer is being manipulated.

With the foregoing and other objects in view, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this specification wherein like characters denote corresponding parts in the several views and in which- Figure 1 is a view and elevation of a power hammer casing showing the device embodying the invention applied thereto;

Fig. 2 is a similar view of a fragment of the hammer with the attachment in section; and

Fig. 3 illustrates a top plan view of the said hammer and attachment.

In these drawings 5 denotes a hammer casing, which may be of ordinary type, hav- Specication of Letters'Patent.

ratenta'rebfsyieeo.

Serial No. 317,770.

ing an exhaust port 6. As the construction of the hammer casing or parts` associated with it, except the port, is immaterial to an understanding` of the invention, further description of the hammer will be omitted.

A metallic plate 7, preferably of copper, has an aperture such as 8, in each end, and an apertured washer 9, preferably 0f leather, is interposed between the plate and the casing 5 of the hammer. A metallic tube 10, preferably of copper, is attached to the plate 7, and an extension 11 of the tube projects through the plate and washer and is adapted to enter the port 6, through which air may escape. rllhe outer end of the tube is iiattened to form a nipple 12 which will direct air to the surface being worked, by the tool 13 which is carried by the casing.

The plate 7 is yieldingly held in place by a spring band 14, which has hook shaped ends 15 and 16 to enter the apertures 8 in the plate, so that the said plate and the tube are yielding-ly held in place to obviate injury when the tool is laid down or the tube comes in contact with any object.

From an inspection of the drawing it will be observed that the tube is curved so that airissuing from the nipple will impinge the work at or about the point where the tool contacts with the work. By reason of this arrangement dust and cuttings are removed about as fast as they are formed and the operator may observe the pattern or the effect of the operation of the tool and he may work to better advantage. At the same time the dust and fragments are blown away and kept from the operators face, eyes and nose, and not permitted to interfere with his vision and breathing.

To prevent dislodgment of thespring 14, the loops of the spring are bent slightly laterally, as at 17, to form anchorages.

I claim:

1. In an attachment for pneumatic hammers, a plate, a tube attached to the said plate and extending therethrough, the said extension being adapted to enter a port of a pneumatic hammer, and.means for holding the plate yieldingly in position on the hammer.

2. In an attachment for pneumatic hammers, a plate, a tube attached to the said plate and extending therethrough, the said extension being adapted to enter a port of a pneumatic hammer, a spring attached to partially embrace the casing of the hammer, thesaid spring having hooks on its aperture through which the extension of the ends engaging the said plate, the loops of tube projects, the said Washer being adapted said spring having oifset ends. to be interposed'between the said plate and 10 3. In an attachment for pneumatic hamT the Casing of the pneumatic hammer7 and 5 mers, a plate, a tube projecting therethrough means for yieldingly attaching the plate to and adapted to enter an exhaust port 0I ai the Casing of the hammer. pneumatic hammer7 a Washer having an MARTIN R. WOOD. 

